MYCN and neuroblastoma: In the multivariate logistic regression analysis, a maximum primary tumor diameter > 13.20 cm and MYCN gene amplification were two independent risk factors for high-risk NB tumor rupture, with adjusted odds ratios (ORs) of 6.401 (1.986, 20.626) and 7.874 (2.520, 24.603), respectively (Supplementary Table 1).